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E. H. BROWN.

DOOR CLOSER,

No. 310,179. ,en-ted Jan. 6, 1885.

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UNITED STATES EDXVARD H. BROVN,

PATENT GEEICEo OF NEW YORK, N. Y.

DOOR-CLOSER.

SPECIFICATION forming part of Letters Patent No. 310,179, dated January 6, 1885,

Application filed March 8, IPH.

To a/Z whom, it may concern.-

Be it known that I, EDWARD H. BROWN, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Door-Shutters, of which the following is a specification.

The object ol' this invention to supply a device that will automatically close a door without shock and without the use of springs or air-cylinders or other delicate mechanism for that purpose, my apparatus working `by the force of gravity alone.

In the different figures ol the drawings similar letters indicate similar` parts.

In Figure l the device is shown applied to a door. In Figs. 2 and 3 enlarged views are shown of it. Fig. 4 is a modification of the device for preventing the door from slamming.

It consists, essentially, of two arms, one, C, swinging on a pivot held by lugs b b', attached to the transom of the door, the other arm, D, swinging between other lugs, c c, at the free end ofthe arm C. By the relative position of these two hinges, pivotings, or sets of lugs the planes of oscillation of the two arms are maintained perpendicular to each other. The arm D is curved, as shown, and carries a weight, E, at its outer end. This weight,pressing the arm D down against the top of the door or against a roller affixed thereto, tends to push it shut. To remove the friction which would exist between the lower edge of the arm and the door, a iiangcd roller, g, carried by a frame, G, is fastened to the door in such a position as to receive the arm D within its grooves. NVhen the door is shut and the arm C pressed in against the transom ,the relative projections of thc lugs c c and frame G are so adjusted that when the door is shut the weighted end of the arm D will hang down nearly or quite in a vertical position. XVhen the door is pushed open, the iirst tendency is to raise the weight E, the rollerg pushing out the armv D; but as thc roller g as the door opens moves through the are of a circle, the arm C turns upon its pivot between the lugs b b, so as to permit the arm D to rest upon the roller g in all positions of the door. The combined movements of the arms C and D about the centers of oscillation,determined by the pivots (No model.)

in the lugs b b' and c cf, cause the arm D to work smoothly between the flanges of the roller g, said arm gradually rising and the arm C gradually swinging outward as the door opens. Then the door is released,the reverse movements take place, the arm D falling and the arm G swinging back against the transom of the door. The effect of this double movement is to makethe closing of the door gentle vet powerful, as the power of the weighted arm D increases as the door swings to, while its rapidity ol action diminishes. To give this arm a greater range of action, its lower edge is curved, as shown in the drawings. An elastic striking-piece, L, is secured to the door-frame, to receive the impact ofthe arm C as it swings home.

To prevent the door from slamming,a striking piece or roller, h, surrounded with an elastic band or packing, I, is attached to the top of the door. The roller is carried by an arm, H, pivoted between the lugs f f ou the frame F. The lower end of the arm H projects, forming a dog, Ji. As the door shuts the roller hy strikes the transoln, is pushed back, and the dog h is pressed inward against a cushion, J, of rubber or other elastic substance. This preveuts any shock when the door closes.

It should be understood that I do not confine myself closely to the particular construction of parts here shown, as modifications may be made without altering my invention.

In Fig. et Ihave shown a modification of my device for preventing the door from slamming, in which H is shown as a rigid arm projecting upwardly and outwardly from the plate F, carrying a cup, M, in which is secured a hollow elastic ball, N, which I prefer to form of rubber. This ball has an aperture, n, for the passage of air in and out of its interior. Upon the opening of the door the ball N becomes filled with air, and when the door is shut the ball strikes the transom or upper part of the door-frame and acts as an air-cushion, pcrmitting of the shutting and latching of the door only as the air is exhausted from its interior.

It is obvious that,il` desircd,the ball N may be attached to the transom or upper part of the door-frame, and the striking-piece H and IOO Cup M act against it, and the same result will be produced.

The Weight Elias a stirrup, c, which is held iu one ofthe holes d at the end d2 of the arm D. By shifting the Weight from hole to hole the power of the Weight may bc altered at pleasure.

\Vhat I claim as novel,and desire to secure by Letters Patent-,is specified in the following claims:

l. In a door-closing apparatus, the combination, with the door and its transom, of the arm C, aitached to said transom by a Vertical hinge, B,and the Weighted arm D, attached to the outer end of arm C by a horizontal hinge, substantially as described.

2. A door-closing apparatus consisting ot' the following parts: the arm C, swinging in a horizontal plane and hinged to the door-frame, i the arm D, hinged to the outer end ofthe arm C, so as to swing vertically, thelatter arm bel ing Weighted at its free end, and a bearing roller, g, carried in suitable bearings attached to the door, so placed that the arm D Will rest upon its periphery as the door opens and shuts, the whole working in combination, substantially as described.

3. In adoor-closing apparatus, the combination, with the door and its transom, of thc horizontally-swinging arm C, hinged to the transom, and the vertically-swinging Weighted arm D, hinged to the outer end of arm C, the arm D being curved upon its under side, substantially as shown, whereby its tendency is to close the door to Whatever extent the latter may be opened, substantially as described.

In witness/whereof I have hereunto set my hand this 26th day of February, 1884.

' E. Il. BROVN. f

In presence of- THos. H. HAR'rWnLL. O. E. DUFFY. 

